[macrafic]

How did you all create the notches in the canopy jettison handle and the canopy release links (RV-7A tipup). Hard steel, with 2 notches needing to be 1/16" wide and another 2 1/8" wide; all 7/8" long.

What kind of tool/blade did you use?

 

[DanH]

I know nothing about that particular RV-7 part, but an abrasive cut-off tool will cut/notch any steel.

Example: http://3mcollision.com/3m-cut-off-wheel-tool-20233.html

 

[BillL]

Yep - Like Dan said . . .

Cut off wheel. You can put it in a drill, drill press, use a Dremel, or die grinder.
If you have a drill press, it makes the dimensional control easier, but others can be done pretty well too.